Mathematics
7 Online
OpenStudy (anonymous):
Evaluate the expression below when x = -4.
4x2 - 2x × 15
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OpenStudy (alexwee123):
4(-4)^2 -2(-4)*15
=4(16)+8*15
=64+120
=184
OpenStudy (alexwee123):
questions? ^.^
OpenStudy (anonymous):
thanks! and you want moree?
OpenStudy (alexwee123):
more questions? o.0
OpenStudy (anonymous):
Evaluate the expression below when g = -6.
-3g - 2 -(-4g + 10)
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OpenStudy (alexwee123):
first sub in the -6 for g\[-3(-6)-2-(-4*(-6)+10) \]
OpenStudy (anonymous):
so justt solve that?
OpenStudy (alexwee123):
yep !
OpenStudy (alexwee123):
tell me what you get after you solve it
OpenStudy (anonymous):
30
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OpenStudy (alexwee123):
nope try again :/
OpenStudy (alexwee123):
hint* you should get a negative number for the answer
OpenStudy (anonymous):
-14
OpenStudy (anonymous):
-18***?
OpenStudy (alexwee123):
ya you got it:-18 ^.^
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OpenStudy (anonymous):
thx!
OpenStudy (alexwee123):
any more questions?
OpenStudy (anonymous):
not at the moment
OpenStudy (anonymous):
Find the value of y when x equals 1 in this equation.
2x + (-7y) = -54
OpenStudy (alexwee123):
@b.l.m hmm what do you think the first step is?
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OpenStudy (anonymous):
solve it
OpenStudy (alexwee123):
yes but how would you solve it?
OpenStudy (anonymous):
puttin 1 into x?
OpenStudy (alexwee123):
yep then what would you do next?
OpenStudy (anonymous):
solve it
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OpenStudy (alexwee123):
yep :) so can you do it for me?
OpenStudy (anonymous):
yupp
OpenStudy (alexwee123):
aight tell me what you get after you solve it
OpenStudy (anonymous):
-6?
OpenStudy (alexwee123):
close but y does not equal -6
\[2(1) + (-7y) = -54\]\[-7y=-56\]\[y=8\]
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OpenStudy (anonymous):
thx
OpenStudy (alexwee123):
anytime ^.^